Having problems activating the hypeScraper plugin...please I need help

Hello...has anybody used hypejunction's hypeScraper plugin...i tried to activate it on my localhost but each time i clicked the "activate" button it displays a blank page...then i ran upgrade.php on my localhost elgg site then it displayed the following

Fatal error: Class 'Guzzle\Http\Client' not found in C:\Program Files (x86)\EasyPHP-DevServer-14.1VC11\data\localweb\karat\mod\hypeScraper\classes\hypeJunction\Scraper\Plugin.php on line 55

i use elgg 2.1,...your assistance will be much appreciated....thanks and best regards..